/*****
 * runlabel.in
 *
 * Runtime functions for label operations.
 *
 *****/

pen      => primPen()
pair     => primPair()
path     => primPath()
picture* => primPicture()
transform => primTransform()
realarray* => realArray()
patharray* => pathArray()  

#include "picture.h"
#include "drawlabel.h"

using namespace camp;
using namespace vm;
using namespace settings;

typedef array realarray;
typedef array patharray;

using types::realArray;
using types::pathArray;

void cannotread(const string& s) 
{
  ostringstream buf;
  buf << "Cannot read from " << s;
  error(buf);
}

void cannotwrite(const string& s) 
{
  ostringstream buf;
  buf << "Cannot write to " << s;
  error(buf);
}

pair readpair(stringstream& s, double hscale=1.0, double vscale=1.0)
{
  double x,y;
  s >> y;
  s >> x;
  return pair(hscale*x,vscale*y);
}

string ASYx="/ASYx {( ) print ASYX sub 12 string cvs print} bind def";
string ASYy="/ASYy {( ) print ASYY sub 12 string cvs print} bind def";
string pathforall="{(M) print ASYy ASYx} {(L) print ASYy ASYx} {(C) print ASYy ASYx ASYy ASYx ASYy ASYx} {(c) print} pathforall";
string currentpoint="print currentpoint ASYy ASYx ";
string ASYinit="/ASYX currentpoint pop def /ASYY currentpoint exch pop def ";
string ASY1="ASY1 {"+ASYinit+"/ASY1 false def} if ";

void showpath(std::ofstream& ps) 
{
  ps << ASYx << newl
     << ASYy << newl
     << "/ASY1 true def" << newl
     << "/fill {" << ASY1
     << pathforall << " (M) " << currentpoint
     << "currentpoint newpath moveto } bind def" << newl
     << "/stroke {" << ASY1 << "strokepath "
     << pathforall << " (M) " << currentpoint
     << "currentpoint newpath moveto } bind def" << endl;
}

array *readpath(const string& psname, bool keep,
                double hscale=1.0, double vsign=1.0)
{
  double vscale=vsign*hscale;
  array *P=new array(0);
  mem::vector<string> cmd;
  cmd.push_back(getSetting<string>("gs"));
  cmd.push_back("-q");
  cmd.push_back("-dNOPAUSE");
  cmd.push_back("-dBATCH");
  if(safe) cmd.push_back("-dSAFER");
#ifdef __CYGWIN__
  const string null="NUL";
#else
  const string null="/dev/null";
#endif
  cmd.push_back("-sDEVICE=epswrite");
  cmd.push_back("-sOutputFile="+null);
  cmd.push_back(psname);
  iopipestream gs(cmd,"gs","Ghostscript");
  stringstream buf;
  while(true) {
    string out;
    gs >> out;
    if(out.empty() && !gs.running()) break;
    buf << out;
  }
  if(verbose > 2) cout << endl;
    
  mem::vector<solvedKnot> nodes;
  solvedKnot node;
  bool cyclic=false;
  bool active=false;
  
  while(!buf.eof()) {
    char c;
    buf >> c;
    switch(c) {
      case 'M':
      {
        if(active) {
          if(cyclic) {
            if(node.point == nodes[0].point)
              nodes[0].pre=node.pre;
            else {
              pair delta=(nodes[0].point-node.point)*third;
              node.post=node.point+delta;
              nodes[0].pre=nodes[0].point-delta;
              node.straight=true;
              nodes.push_back(node);
            }
          } else {
            node.post=node.point;
            node.straight=false;
            nodes.push_back(node);
          }
          P->push(path(nodes,nodes.size(),cyclic));
          nodes.clear();
        }
        active=false;
        cyclic=false;
        node.pre=node.point=readpair(buf,hscale,vscale);
        node.straight=false;
        break;
      }
      case 'L':
      {
        pair point=readpair(buf,hscale,vscale);
        pair delta=(point-node.point)*third;
        node.post=node.point+delta;
        node.straight=true;
        nodes.push_back(node);
        active=true;
        node.pre=point-delta;
        node.point=point;
        break;
      }
      case 'C':
      {
        pair point=readpair(buf,hscale,vscale);
        pair pre=readpair(buf,hscale,vscale);
        node.post=readpair(buf,hscale,vscale);
        node.straight=false;
        nodes.push_back(node);
        active=true;
        node.pre=pre;
        node.point=point;
        break;
      }
      case 'c':
      {
        cyclic=true;
        break;
      }
    }
  }
  
  if(!keep)
    unlink(psname.c_str());
  return P;
}

// Autogenerated routines:


void label(picture *f, string *s, string *size, transform t, pair position,
           pair align, pen p)
{
  f->append(new drawLabel(*s,*size,t,position,align,p));
}

bool labels(picture *f)
{
  return f->havelabels();
}

realarray *texsize(string *s, pen p=CURRENTPEN)
{
  texinit();
  processDataStruct &pd=processData();
  
  string texengine=getSetting<string>("tex");
  const char **abort=texabort(texengine);
  setpen(pd.tex,texengine,p);
  
  double width,height,depth;
  if(!texbounds(width,height,depth,pd.tex,*s,abort,false,true))
     return new array(0);
  
  array *t=new array(3);
  (*t)[0]=width;
  (*t)[1]=height;
  (*t)[2]=depth;
  return t;
}

patharray *_texpath(string *s, pen p=CURRENTPEN)
{
  array *P=new array(0);
  if(s->empty()) return P;
  
  string prefix=outname();
  spaceToUnderscore(prefix);
  string psname=auxname(prefix,"ps");
  string texname=auxname(prefix,"tex");
  string dviname=auxname(prefix,"dvi");
  bbox b;
  string texengine=getSetting<string>("tex");
  bool pdf=settings::pdf(texengine);
  texfile tex(texname,b,true);
  tex.miniprologue();
  tex.setfont(p);
  
  if(!pdf) {
    tex.verbatimline("\\special{ps:");
    tex.verbatimline(ASYx);
    tex.verbatimline(ASYy);
    tex.verbatimline("/ASY1 true def");
    tex.verbatimline("/v {"+ASY1+"neg exch 4 copy 4 2 roll 2 copy 6 2 roll 2 copy (M) print ASYy ASYx (L) print ASYy add ASYx (L) print add ASYy add ASYx (L) print add ASYy ASYx (c) print} bind def");
    tex.verbatimline("/show {"+ASY1+
                     "currentpoint newpath moveto false charpath "+
                     pathforall+"} bind def}");
  }
  tex.verbatimline(*s+"%");
  tex.epilogue(true);
  tex.close();
  
  int status=opentex(texname,prefix);
  
  string pdfname;
  if(!status) {
    if(pdf) {
      pdfname=auxname(prefix,"pdf");
      std::ofstream ps(psname.c_str());
      if(!ps) cannotwrite(psname);
      
      showpath(ps);

      mem::vector<string> cmd;
      cmd.push_back(getSetting<string>("gs"));
      cmd.push_back("-q");
      cmd.push_back("-dNOCACHE");
      cmd.push_back("-dNOPAUSE");
      cmd.push_back("-dBATCH");
      if(safe) cmd.push_back("-dSAFER");
      cmd.push_back("-sDEVICE=epswrite");
      cmd.push_back("-sOutputFile=-");
      cmd.push_back(pdfname);
      iopipestream gs(cmd,"gs","Ghostscript");
      
      gs.block(false);
      while(true) {
        string line;
        gs >> line;
        if(line.empty() && !gs.running()) break;
        ps << line;
      }
      ps.close();
    } else {
      mem::vector<string> dcmd;
      dcmd.push_back(getSetting<string>("dvips"));
      dcmd.push_back("-R");
      dcmd.push_back("-Pdownload35");
      dcmd.push_back("-D600");
      push_split(dcmd,getSetting<string>("dvipsOptions"));
      if(verbose <= 2) dcmd.push_back("-q");
      dcmd.push_back("-o"+psname);
      dcmd.push_back(dviname);
      status=System(dcmd,0,true,"dvips");
    }
  }

  if(status != 0)
    error("texpath failed");
    
  bool keep=getSetting<bool>("keep");
  if(!keep) { // Delete temporary files.
    unlink(texname.c_str());
    if(!getSetting<bool>("keepaux"))
      unlink(auxname(prefix,"aux").c_str());
    unlink(auxname(prefix,"log").c_str());
    if(pdf)
      unlink(pdfname.c_str());
    else
      unlink(dviname.c_str());
    if(settings::context(texengine)) {
      unlink(auxname(prefix,"top").c_str());
      unlink(auxname(prefix,"tua").c_str());
      unlink(auxname(prefix,"tui").c_str());
    }
  }
  return pdf ? readpath(psname,keep,0.1) : readpath(psname,keep,0.12,-1.0);
}

patharray *textpath(string *s, pen p=CURRENTPEN)
{
  array *P=new array(0);
  if(s->empty()) return P;
  
  string prefix=outname();
  spaceToUnderscore(prefix);
  string outputname=auxname(prefix,getSetting<string>("textoutformat"));

  string textname=auxname(prefix,getSetting<string>("textextension"));
  std::ofstream text(textname.c_str());
  
  if(!text) cannotwrite(textname);

  text << getSetting<string>("textprologue") << newl
       << p.Font() << newl
       << *s << newl
       << getSetting<string>("textepilogue") << endl;
  text.close();
  
  string psname=auxname(prefix,"ps");
  std::ofstream ps(psname.c_str());
  if(!ps) cannotwrite(psname);

  showpath(ps);
  
  mem::vector<string> cmd;
  cmd.push_back(getSetting<string>("textcommand"));
  push_split(cmd,getSetting<string>("textcommandOptions"));
  cmd.push_back(textname);
  iopipestream typesetter(cmd);
  
  mem::vector<string> cmd2;
  cmd2.push_back(getSetting<string>("gs"));
  cmd2.push_back("-q");
  cmd2.push_back("-dNOCACHE");
  cmd2.push_back("-dNOPAUSE");
  cmd2.push_back("-dBATCH");
  if(safe) cmd2.push_back("-dSAFER");
  cmd2.push_back("-sDEVICE=epswrite");
  cmd2.push_back("-sOutputFile=-");
  cmd2.push_back("-");
  iopipestream gs(cmd2,"gs","Ghostscript");
  gs.block(false);

  // TODO: Simplify by connecting the pipes directly.
  while(true) {
    string out;
    if(typesetter.isopen()) {
      typesetter >> out;
      if(!out.empty()) gs << out;
      else if(!typesetter.running()) {
        typesetter.pipeclose();
        gs.eof();
      }
    } 
    string out2;
    gs >> out2;
    if(out2.empty() && !gs.running()) break;
    ps << out2;
  }
  ps.close();
  
  if(verbose > 2) cout << endl;
  
  bool keep=getSetting<bool>("keep");
  if(!keep) // Delete temporary files.
    unlink(textname.c_str());
  return readpath(psname,keep,0.1);
}

patharray *_strokepath(path g, pen p=CURRENTPEN)
{
  array *P=new array(0);
  if(g.size() == 0) return P;
  
  string prefix=outname();
  spaceToUnderscore(prefix);
  string psname=auxname(prefix,"ps");
  bbox b;
  psfile ps(psname,false);
  ps.prologue(b);
  ps.verbatimline(ASYx);
  ps.verbatimline(ASYy);
  ps.verbatimline("/stroke {"+ASYinit+pathforall+"} bind def");
  ps.resetpen();
  ps.setpen(p);
  ps.write(g);
  ps.strokepath();
  ps.stroke();
  ps.verbatimline("(M) "+currentpoint);
  ps.epilogue();
  ps.close();
  return readpath(psname,getSetting<bool>("keep"));
}